Steam-engine



. (No Model.) f

E. BEARS.

STBAMYBNGINE.

Patented Jan. 29, 1889.

@WMMMW N. PETERS, Phommhugvapher, washington, D, C.

UNITED STATES PATENT @EricE ERNEST EARE, OF CHESTER, ILLINOTS.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 396,850, dated January 29, 1889.

Application ned July 28,v 1888.

T all whom, t 71mg concern:

Be it known that I, ERNEST BEARE, of Ghester, in the county of Randolph and State of Illinois, have invented a new and Improved Steam- Engine, of which the following is a full, clear, and exact description.

My invention relates to an improvement in valve-gears `for steam-engines, and has for its object to provide a gear especially adapted for statioi'iary and marine engines of simple and effective construction; and the 'further object of the invention is to provide a means whereby the grinding ot' the valve-seats will be dispensed with and wherein there will be no down pressure on the valves, and wherein, further, the wear oi' the valves will be effectively taken up by the packing-rings.

The invention consists in the construction and combination ot' the several. paris, as will be hereinafter fully set forth, and pointed out in t-he claims.

Reference is to be had to the aceonmanying drawings, forming a part of this specification, in which similar figures off reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of a stationary engine having' my improved valve-gear applied. Fig. 2 is a central longitudinal and vertical section, and Fig. 3 is a transverse section on line 5c of Fig. 2.

In carrying out the invention the steamchest 10 is located at one side of the cylinder 11, extending, essentially, trom end to end of the latter. The said steanrchest 10 is divided longitudinally into two compartments, 12 and 13, the compartment l2 being adapted to receive live steam, which is supplied thereto through the medium ot' a pipe, 14, extending vertically upward outside of the said steamchest, and the lower compartm ent, 13, is purposed to receive the exhaust-steam, which is discharged through a suitable valve, 15,10- cated in the bottom of the chest.

Upon the upper portion of the chest, and preferablyT at the center of the same, astandard, 16, is secured, in which standard a rockshaft, 17, is fulcrumed, carrying oppositelyextending and preferably upwardly-curved ngers 18. To the outer end ot' the said rockshaft 17 a lever, 19, is centrally secured, provided with wrist-pins 20, one at each extrent Serial No. 281,264. (Nomodel.)

ity. Upon the (lrive-sha'ft 2l of the engine an essentially heart-shaped cam, is keyed,

which cam adapted to reciprocate the yoke 23 of the horizontal cam-rod 2l, the saidhorizontal cam-rod 24 being pivotcd at or near the center to a vertical link, 25, thelower end ot which is pivotally connected with the engine bed or foundation.

The upper end oi the link 25 is pivotally connected to one ot' the members of the lever 19 through the medium of a pitman, 26. The object of providing the lever with a wrist-pin at each extremity is that one wrist-pin may be utilized to go ahead and the other to back upon when connected with the pit-man 26.

At each end of the steanrchest 10 a vertical cylindrical casing, 27, is formed, having a port, 23, leadin'g'into the upper or live-steam chamber, l2, and a similar port, 29, leading into the lower or exhaust chamber, 13. In the `said cylindrical casing 27 a plunger like valve, 30, is held to reciprocate, which valve is provided with a central circumferential groove, 31, the surface above and below the said groove 31 being provided with a metallic packing-ring', 32, adapted to take up the wear of the valve.

In the rear of each cylindrical casing two ports, 33 and 341, are produced, one below the other, and similar ports are also produced in the steam-cylinder 11, the ports 33 and 34 being in horizontal alignment with the ports 28 and 29.

The ports 33 and 3i in the valve-casing are made just large enough to admit steam into the cylinder 1l and take the exhauststeam therefrom, and are preferably widened out longitudinally of the cylinder. The rings 32 ot' the valve are the same width as or a little larger than the ports, thereby preventing the valves from catching when in operation.

The cylindrical valve-casings 27 are provided with an inclosed top and a suitable stuiiingbox, through which a val.ve-rod, 35, is vertically projected, connected with the plungers ot' the valves, and the said pistonrods 35 at their upper ends are pivotally united to a lever, 3G, at one side oli the center of the same, the outer end of which lever is pivotcd upon a standard, 37, preferably sem cured' to a bracket, 38, extending outward from the valve-casing, as best illustrated in Figs. 1 and 2, and the inner ends of the said levers 36 are made to rest, respectively, upon theiingers 18.

In operation, wh en the plunger of one valve is down in the Casing' the plunger of the opposite valve is elevated. Thus at the right in Fig. 2 the live steam entering the chamber 12 passes through the port 28 into the groove 31 of the valve, and from thence through the port 33 into the steam-cylinder 11, and the Said steam entering the said cylinder at the rear of the piston forces the said piston forward. rlhe live-steam port at the left is now closed by the upper portion of the valveplunger, and the exhaust-ports 29 and 341 are open, whereby the exhaust-steam from the' cylinder, passing through the cylinder-port 34 and around the surface of the piston, finds its way into the exhaust-chamber 13 through the port 29, and from thence out into the atmosphere through the valve 30. y

, Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the cylinder o'l' an engine, of the steam-chest 10, divided longitudinally into the compartments 12 and 13, the vertical cylindrical Casin gs 27 at the ends of the steam-chest and communicating with the compartments 12 and 13 of the steamchest and with the steam-cylinder, the valves 30 in the cylindrical casings 27, and means for operating the said valves, substantially as herein shown and described.

2. The combination, with the steam-cylinder 11 and the drive-shaft 2l, provided with the Cam 22, of the steam-chest 10, provided with the comliiartments l2 and 13, the cylindrical casings 27 at the ends of the steamchest and communicating therewith and with the steam-cylinder 11, the valves 30 in the cylindrical casings 27 and provided with the rods 35, the pivoted levers 3G, to which the valve-rods 35 are pivoted, the rock-shaft 17, provided with the curved lingers 18 and the lever 1f), the pitn'xan 26, the link 25, the camrod 2t, and the yoke 23, substantially as herein shown and described.

ERNEST BEARE.

lVt-nesses:

J. F. WAssELL, J. D. GERLACH. 

